-- Server Script
local VoiceChatService = game:GetService("VoiceChatService")
local TeleportService = game:GetService("TeleportService")
local Players = game:GetService("Players")

local TARGET_PLACE_ID = 1234567890 -- Destination place ID

--[[
	Stubbed universe-wide server state.
	In practice, this data could be stored and updated using MemoryStore
	or another backend system.

	Example shape:
	ActiveServers = {
		{
			serverId = "abc",
			accessCode = "reserved-server-code",
			groupUserCounts = {
				groupA = 12,
				groupB = 5
			}
		},
		{
			serverId = "def",
			accessCode = "reserved-server-code",
			groupUserCounts = {
				groupB = 8
			}
		}
	}
]]
local ActiveServers = {}

local function teleportPlayerToBestServer(player)
	local success, chatGroups = pcall(function()
		return VoiceChatService:GetChatGroupsAsync({ player })
	end)

	if not success or not chatGroups then
		warn("Failed to retrieve chat groups for player:", player.UserId)
		return
	end

	-- Collect all chat group IDs the player is eligible for
	local playerGroupIds = {}
	for _, group in ipairs(chatGroups) do
		for _, groupId in ipairs(group) do
			playerGroupIds[groupId] = true
		end
	end

	local bestServer = nil
	local bestUserCount = 0

	-- Choose the server with the highest number of compatible users
	for _, server in ipairs(ActiveServers) do
		local compatibleUserCount = 0

		for groupId, userCount in pairs(server.groupUserCounts) do
			if playerGroupIds[groupId] then
				compatibleUserCount += userCount
			end
		end

		if compatibleUserCount > bestUserCount then
			bestUserCount = compatibleUserCount
			bestServer = server
		end
	end

	if not bestServer then
		warn("No suitable server found for player:", player.UserId)
		return
	end

	local ok, err = pcall(function()
		TeleportService:TeleportToPrivateServer(
			TARGET_PLACE_ID,
			bestServer.accessCode,
			{ player }
		)
	end)

	if not ok then
		warn("Teleport failed:", err)
	end
end

Players.PlayerAdded:Connect(teleportPlayerToBestServer)